Github user advancedxy commented on a diff in the pull request: https://github.com/apache/spark/pull/21397#discussion_r189973566 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/python/ArrowPythonRunner.scala --- @@ -94,8 +88,18 @@ class ArrowPythonRunner( writer.writeBatch() arrowWriter.reset() } - } { writer.end() --- End diff -- So basically your change makes sure that `root` and `allocator` is safely closed in the final block and hence we don't need the safe belt in `TaskCompletionListener`?
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